The Government Accountability Office (GAO) has issued a report entitled “States Reported Billions More in Supplemental Payments in Recent Years.” According to the GAO, states reported $32 billion in Medicaid supplemental payments during FY 2010, but the exact amount of such supplemental payments is unknown because state reporting was incomplete. For instance, states reported a total of $17.6 billion in disproportionate share hospital (DSH) payments, with four states -- New York, California, Texas, and New Jersey — accounting for almost half of the nationwide total. DSH payments as a percentage of total Medicaid payments varied considerably (from 1% to 17%) among the 50 states that reported DSH payments. States also reported a total of $14.4 billion in non-DSH supplemental payments to hospitals and other providers, which was more than $8 billion higher than 2006 levels (the GAO attributes this to both more complete state reporting of payments and new and modified supplemental payments). The GAO highlights the importance of ongoing federal efforts to improve the completeness of states’ reporting of supplemental Medicaid payments.